Tar ‧ dis, the /ˈtɑːdəs, ˈtɑːdɪs $ ˈtɑːr-/ BrE AmE
the machine used by Dr Who and his friends for travelling through time in the British television programme Dr Who . On the outside, the Tardis is small and looks like a type of ↑ telephone box that was formerly used by the British police, but it is much larger inside.